Gael kupfer



/ @uitrit istria geteld @'fff# CARL' K UPFER, OF MADISON, WISCONSIN, ASSIGNOR TO HIMISELF AND KUND e J. FLEISOHER, OF SAME PLACE.

Letters Patent No. 81,795, dated September 1, 1868.

IMPROVEMENT IN PLANES FOR CUTTING BLIND-SLATS.

dtethetnle munt tu im tigres ettets trttnt mit limiting gaat nf the time.

To ALL wHoM ir MAY coNoERN:

Be it known that I, CARL KUPFER, of Madison, in the county of Dane, and State of Wisconsin, have made new and useful Improvements in Slat-Cutting Machinery; and I do hereby declare the following lto be a full, clear, and exact description of the nature, construction, and operation of. the same, suicient to enable one skilled in the art to which it appertains to construct and use the same, reference being'had to the accompanying drawings, which are made part-ofthis specification, and in which-- Figure 1 is a perspective view.

FigurefZ is an e'nd sectional view.

Figurc is an enlarged side sectional view.

Figure 44s a side sectional view. y

The invention consists in the construction of a knife or plane-bit, whose edge or edges are so shaped,

` arranged, and combined as to cut the top, sides, and bottom oi' the sla-t at one stroke of the piene across the stick of timber from which the Slat is to be out, and in leaving a Vstraight edge or side, against which thc Yshoulder of the plane is brought, and which serves as a guide for the plane in cutting each succeeding slat.

The bit A is'made of a piece of steel, of suitable dimensions for `.the size of slat to be out, with its lower cutting-end, B, bent to en angle of forty-five degrees, or thereabouts, from the line ofthe body ofthe bit, and l projecting downwards, as shown at I3, iig. 4. This projection is pierced with a hole,'as at C, fig. 2, of any desiredshapefor the slet, and in a line with the face of-the plane D, as shown atC, iig. 2; the upper and lower edges ofthe aperture being brought to sharp cutting-edges, as at 1 2, iig. 2.

In sharpening these'edgcs, caremust be taken to leave two lips, whose'edges, 3 4, iig. 2, are at right angles with the upper and lower cutting-edges 1.2. The bit A is set in a plane-stock, D, and secured in the ordinary manner with a wedge, E, there'being a -suiiicient throat, F, vfor the escape of all shavings.l The front end 'of the plane-stock 4is provided with a handle, G, to facilitate holding the tool firmly.

By .the use of this tool I am enabled to avoidjthe use of sawed lumber of anyikinth and, instead, use timber as it is split from tbe log, like tire-wood, or without splitting at all, and I thus save from one-half`to nin`e-` tenths of the timber, and consequently a large proportion of the cash outlay formerly paid for stock. l I-Iavingdescribcd my invention, what/I claim, and desire to secure by Letters Patent, is-

1. The bit A, when constructed with sharpened upper and lower edges7 1 and 2, leaving two lips, 3 and 4, said lips to be at right angles with the upper and lower cutting-edges, substantially as and for the purpose set forth. v

2. 'The combination ofthe bit A, as described and claimed, with the plane-stock, for the use and purposes specified.

CARL KUPFER. 'Witnesses J. C. Sensus,

A. JRGENS. 

